In Germany default regulation (§622 BGB) is 4 weeks towards 15th or last day of month, but I've seen 2 or 3 months contracts, for senior management even 6 month

In Germany default regulation (§622 BGB) is 4 weeks towards 15th or last day of month, but I've seen 2 or 3 months contracts, for senior management even 6 months (rare though). Often the first 6 months of employment are on probation and only 2 weeks notice are neccessary.